Machine and method of weeing



Ju ly:l2, V11949. 1, M. A. GACIAl MACHIN AND METHOD 0F UNITING SUPERIMPOSED FABRICS original Filed sept. s, 1942` s' sheets-sheet 2 QNN QNN.

NNNNN m July 12,1949. l. M. A. GARCIA MACHIN AND METH-OD OF UNITING'rSUPERIMPOSED FABRICS s sheets-sheet. s

' original Filed' sept'. s. 1942 'INI/EN um aro/wc.

is possible only by reason of the fact that the disk 98 is mounted so as to turn on its axial bolt IUI). The movement is only slight, either clockwise or counterclockwise. Thus the needle bar is given a reciprocatory movement during its `rotary motion.

In Figure 11, the bar 82 has an upward motion indicated lby the arrow |04, a rotary motion through one-half revolution indicated by the arrow |08, a downward motion indicated by the arrow |08 and a rotary motion through one-half revolution indicated by the arrow H0. `Since the needle 84 moves with the bar 82, a corresponding motion is imparted to the needle. In oth-er words, the needle penetrates the ywork in its downward stroke, rotates one-half revolution, withdraws from the work and then makes another half revolution.

The lower part of the needle 84 is of U-shaped formation, as shown in Figure 10, having an up- :turned hook II2 providing a thread engaging crotch while the lower extremity tapers to a point indicated yat I I4.

A spring arm |216 fastened to the side wall of the machine frame is directed so that its end portion is resiliently pressed against the teeth 58 of wheel 54 to preclude reverse rotation of `the wheel when the link 58 traverses its return in operative stroke. An inclined arm |28 having its upper end fastened against the wall `5I! extends adjacent to one side edge of the lower part of the link 58 and the upper free end portion of the spring arm I 26, as shown to advantage at Figures 2, 3 and 5 so that this inclined arm on one side and the wall 50 on the opposite side restrain sidewise movement of the link :and spring arm to maintain the same in contact with the notches o-f the wheel 54.

During operation, as for example to stitch a pair of superposed sheets of fabric IIS fed hori- Zontally from right to left along the bed I4 and under the presser I 8, as viewed from Figure l, the needle is initially caused to move downwardly from its uppermost position -above the sheets, as shown at A in Figure 12, to penetrate -both sheets. When the hook H2 attains its lowermost position below the sheets it is turned through a half-turn movement, as seen at B, following which it is pulled straight upward. During its return movement through the sheets it successively engages a pair of superposed threads thereof, indicated at IIB, land elevates the same to looped arrangement as at C. After reaching its elevated position the needle is again turned through a half-turn and twists the loops |20 as shown at D. Upon subsequent descent of the needle from the last position the link 58 effects la one-step partial turn of wheel 54 and, through the shaft 46, similar movement of the feed vwheels 40 in a counterclockwise direction, referring to Figure l, to advance the sheets a predetermined step toward the left. Since the needle remains within the loops thus formed the latter are'elongated and pulled into a position lengthwise of the upper surface of the upper sheet, the needle lagain penetrating the sheets in an advanced point. At the beginning of this additional penetration the loops remain above the uppermost of the layers of fabric and the needle passes downwardly within the loop. The action is clear, if it .be .assumed that the upper layer of fabric prevents the loop from following the needle downward. At the bottom of its stroke the needle is again turned so that during its subsequent upward stroke it again engages and loops a pair of threads which are drawn through the now stationary first loops as illustrated at F of Figure 12 and G of Figure 13. When the needle has again attained its top position it executes another half-turn and the sheets are advanced to the second step to .bend the second loops I24 downwardly and enchain the first loop, as seen at H. The operation is repeated, as at I, for the desired length of the sheets to form a succession of chain stitches as shown at Figure 14, securely connecting the sheets of fabric.

I claim:

1. A sewing machine for uniting woven superposed fabrics, comprising a needle bar mounted for both rotary and reciprocatory movement, means for continuously rot-ating the needle bar, a needle carried by the needle bar having a hook shaped to pass freely through the fabrics and to pull threads from the fabrics upon withdrawal of the needle to form a loop from fthe thread, a cam means including a part adapted to cause the needle bar to reciprocate during rotation, whereby the said needle is caused to pass through the fabric and after a half-turn of the needle to pick up the threads and then to withdraw the needle from the fabric and during the next half-turn to impart a twist to said loop.

2. The invention described in claim 1 wherein a bed plate is provided for supporting the fabric and provided with an opening through which said needle passes, a rotary feed for the fabric, and an operating connection between said cam means and said rotary feed to impart feeding motion thereto.

3. The invention described in claim 1 wherein a bed plate is provided for supporting the fabric and having an opening for passage of the needle therethrough, said reciprocatory and rotary needle `bar having said needle detachably connected therewith, said cam means comprising a cam fixed to said needle bar and a cam actuator imparting reciprocatory motion to the needle bar through relative rotation of the cam with respect to the actuator, a rotary feed member for the fabric, a notched wheel xedly connected with said rotary feed member, a pivoted lever operatively connected with said cam to be rocked 'through reciprocatory motion of the bar and the cam, and an operating connection between said lever and said notched Iwheel to impart step by step rotary motion to said feed member,

4. The invention described in claim 1 wherein a bed plate is provided for supporting the fabric and having an opening for passage of the needle therethrough, said reciprocatory :and rotary needle bar having said needle detachably connected therewith, said cam means comprising a cam fixed to said needle .bar and a cam :actuator imparting reciprocatory motion to the needle bar through relative rotation of the cam with respect to the actuator, a rotary feed member for the fabric, a notched wheel xedly connected with said rotary feed member, a pivoted lever operatively connected with said c-am to be rocked through reciprocatory motion of the needle bar and the cam, an operating connection between said lever and said notched wheel to impart step by step rotary motion to said feed member, a presser coacting with said bed plate, said presser being attached to a bar, non-circular in cross section and mounted in corresponding openings in a support therefor for guiding the presser bar in a reciprocatory path, a nger lift on said presser bar and spring means acting on said presser bar to yieldingly press the presser against the fabric on the bed plate.

5. -1Asewing machine'for uniting woven superimposed fabrics, comprising aneedle bar mountedfor both rotary and reciproc-atory movement, meansforfcontinuously rotating the needle bar, aineedle carried bythe needle bar having a hoolf: shaped topass 'freelythrcugh the fabrics and to pullthreads from the fabrics upon withdrawal ofthe needle to form a loop from the threads, means for reciprocating the needlebar during rotation, as a result of which movements the said needle isy causedtopass through the fabric, make a half-turn-of the needle andthus pick upthe threads, and then'to withdraw from the fabric, llto lengthen the loop, and then make a half-turniin which a twist is imparted to said loop.

\6."Thelinvention-described'in claim 1 wherein said -needle is ydetachably connected with the rotary and reciprocatorynee'dle bar, and in which said -rneansffor -reciprocating'the needle bar includesarotatablecam and means for imparting areciprocatory motion to the needle bar through relativerotationof said cam and said means for imparting a reciprocatorymotion, said cam having a continuous flange provided with portions offsetone fromtheother axially of the axis of rotation of the cam'and .interconnected by diagonal portions, said lmeans for imparting a reciprocatory-motion comprising two spaced cam engaging elements adapted to engage the opposite. sidesofcsaid flangaand a mount for said cam engaging elements.

7. Thelmethod of mechanically uniting a plurality-,of super-imposed'fabricsby means of separating'andinter-looping their own threads as a source of thread'for effecting the;uniting and comprising subjecting said fabrics while in superimposedposition ito the :following steps in se- `cuencamechanically separating -a thread from a first one of said fabrics below the uppermost fabric f bypullingthe same through-the fabrics thereabove and into spaced relation with respect to thessurface 'of .the-uppermost fabric, forming said ypulled thread `into a :loop :above the uppermost'fabric, keedingly moving Vsaid fabrics, elongatingsaidloop in-a direction opposite tovthat of the'feedvof fthegfabrics, again mechanically separating la vthread from the -same first one ofsaid fabrics by pulling one-of vsuch threads into spaced `relation 1 to =said .fabrics and through said-elongated loop, and successively repeating said steps.

8. Thevmethodiof.mechanically uniting a plurality, of super-imposed .fabr-icsfby means. of separating and inter-.looping their own threads as the vsole source'of threadifor effecting the uni ing and comprising subjecting saidfabr-ics while insuperimposed.position to the following steps ini-sequence, ymechanically separating a thread from a first one of said fabrics` belowtheuppermost fabric by ,pulling the same through the fabricsfthereabove;.a1idinto spaced relation with respect tothe surfaceof the uppermost fabric, forming said pulled thread into a-loop above the uppermost fabric, feedinglymoving said fabrics, elongating said loop in a direction opposite to that of the feedrof thefabricaseparating said loop from the needle so that the loop is above the uppermost of said super-imposed fabrics, passing the needle downwardly through said fabrics, and using the needle .to againmechanically kseparate a lthread from the same rst one of said fabrics by pulling one of `such threads into spaced relation to said fabrics and through said elongated vloop, and successively repeating saidsteps.

'9. The method--of mechanically. uniting 4a plural-ityof super-imposed fabricsi by meansv of. separating and linterlooping their own threads as the-sole' sourceof thread for.` effecting the uniting and comprisingsubjecting Lsaidfabrics while in super-imposed--position tothe following steps 4in sequence, mechanically separating threads from each of saidfabrics by pulling the threads into spaced. relation with-respect to thesurface of the upper fabric, forming `said pulled thread into alloop,feedingly moving said fabrics, elongating said-loop'in a direction opposite to that of the feed ofthe fabrics, again mechanically separating threads'from eachof the same fabrics by pulling such threads into spaced relation to said fabrics andithrough said elongated loop, and successively repeatingsaid steps.

10. 'The' method of mechanically uniting a pluralityof super-imposed fabrics by means of separating and inter-.looping their own threads as thesolesource of thread for effecting the uniting andcomprising subjecting said fabrics while in super-imposedposition to the following steps in sequence, mechanically separating threads from each of ysaid fabricsby pulling the threads into spaced Irelation with respect to the surface of the upper fabric, forming said-pulled thread into a loop, feedingly moving said fabrics, elongating said loop in a direction opposite to that of the feed of the fabrics,L separating said'loop from the needle so lthat the loop is above the uppermost of said super-imposed fabrics, and passing the needle downwardly through said fabrics, and using theneedle to again mechanically separate threads fromieach of-the same fabrics by pulling such threads Vinto ,spaced relation to said fabrics and `:through said elongated loop, `and `successivelyrepeating said steps.

11.A sewing machine `for uniting a plurality of superimposed fabricsby utilizing `as -a-source of :thread some offtheir'own threads as binding means, comprising aneedle bar, a hooked needle detachably and fixedly mounted in the end p0rtion of said needle bar, means'for rotating said needle bar on its -longitudinal axis, means for intermittently reciprocating said needle bar during therotationthereof for positioning the hooked portion of said needle periodically above and below s-aidfabrics during said rotation and to move said hookedportionthrough the superimposed .fabrics for engaging and separating ,certainfthreads thereof, and feeding means to move said fabrics beneath ysaid needle.

12..A sewing machine for uniting a plurality of superimposed fabrics by-utilizing as thesole source-of threadsomeof their own threads as ,binding means, comprising a. needle bar, a` hooked needle .detachably and fixedly mounted in the end. portion ofsaid needlebar,v means for rotating said needle bar on its `longitudinal axis, means for lintermittently reciprocating said needle bar during the rotation thereof for positioning the hooked portion of said needleperiodically above and rbelow said fabrics during the rotation thereof andr to move said=hooked portion through the superimposed fabricsfor., engaging and separating some of the threads of the lowermost of the superimposed .fabrics and pulling such threads upwardly into position above the uppermost of said fabrics, and feeding means to move said fabrics ,beneath said needle.

1.3. A sewing machine for uniting a plurality lof superimposed fabrics by utilizing as the sole source Aof lthread some of their own threads vas binding means, comprising a needle. bar, a hooked needle detachably and flxedly mounted vin the end portion of said needle bar, means for rotating said needle bar on its longitudinal axis through an arc of about 180 While above said fabrics and through an arc of about 180 while below said fabrics, means for intermittently reciprocating said needle bar during the rotation thereof, for positioning the hooked portion of said needle periodically above and below said fabrics during the rotation thereof and to move said hooked portion through the superimposed fabrics for engaging and separating some of the threads of the lowermost of the superimposed fabrics and pulling such threads upwardly into position above the uppermost of said fabrics, feeding means to move said fabrics beneath said needle, a supporting surface for said fabrics while being so moved beneath said needle, and a presser bar holding said fabrics against said supporting surface.

14. A sewing machine for uniting a plurality of superimposed fabrics by utilizing as the sole source of thread some of their own threads as binding means, comprising a needle bar, a hooked needle detachably and lixedly mounted in the end portion of said needle bar, means for rotating said needle bar on its longitudinal axis, means for intermittently reciprocating said needle bar during the rotation thereof for positioning the hooked portion of said needle periodically above and below said fabrics during said rotation and to move said hooked portion through the superimposed fabrics for engaging and separating certain threads thereof, feeding means to move said fabrics beneath said needle, a supporting surface for said fabrics while being so moved beneath said needle, and a presser bar holding said fabrics against said supporting surface.

15. The method of mechanically uniting a plurality of superimposed fabrics by means of separating and interloping their own threads as the sole source of thread for effecting the uniting and which method comprises subjecting said fabrics While in superimposed position to the following steps in sequence, mechanically separating a thread from the lowermost one of said fabrics by pulling the same into spaced relation with respect to the upper surface of the uppermost fabric, forming said pulled thread into a first loop, feedingly moving said fabrics, elongating said first loop in a direction opposite to that of the feed of the fabrics, again mechanically separating a thread from the same lowermost fabric by pulling one of such threads as a second loop into spaced relation to the uppermost of said fabrics and through said rst elongated loop, and successively repeating said steps.

16. The method of mechanically uniting a plurality of superimposed fabrics of which the lowermost member furnishes thread to secure the plurality of superimposed-fabrics together, by means of separating and interlooping thread from such fabric as the sole source of thread for effecting the uniting and which method comprises subjecting said fabrics while in superimposed position to the following steps in sequence, mechanically separating a thread from the lowermost one of said fabrics by pulling the same into spaced relation with respect to the upper surface of the uppermost fabric, forming said pulled thread into a first loop, feedingly moving said fabrics, elongating said first loop in a direction opposite to that of the feed of the fabrics, again mechanically separating a thread from the same lowermost fabric by pulling one of such threads as a second loop into spaced relation to the uppermost of said fabrics and 8 through said first elongated loop, and successively repeating said steps. l

17. A sewing machine for uniting a plurality of superimposed fabrics by utilizing as the sole source of thread some of their own threads as binding means comprising a needle bar, a hooked needle detachably and iixedly mounted in the end portion of said needle bar, means for intermittently reciprocating said needle bar whereby said needle is reciprocated through the superimposed fabrics for engaging and separating certain threads of the fabrics, means for periodically moving said needle through an arc of approximately degrees on its longitudinal axis while periodically its hooked part is below and above said fabrics to give the hooked needle the following motions in sequence, through the fabrics from above to below fabrics, through approximately 180 degrees motion on its longitudinal axis, through the fabrics from below to above fabrics, through approximately 180 degrees motion on its longitudinal axis, and repeating this sequence consecutively, and feeding means to move said fabrics beneath said needle.

18. The invention described in claim 1, wherein said needle is detachably connected with the rotary and reciprocatory needle bar, and in which said cam means comprises a cam fixed to said needle bar and having a continuous flange extending around said needle bar, a cam actuator for imparting reciprocatory motion to the needle bar through relative rotation of said cam, said flange being provided with portions offset one from the other axially of said needle bar and interconnected by diagonal portions, said actuator comprising two rotary wheels engaging opposite sides of said flange, and a mount for said wheels.

19. A sewing machine for uniting woven superposed fabrics, comprising a needle bar mounted for both rotary and reciprocatory movement, means for continuously rotating the needle bar, a

needle carried by the needle bar having a hook shaped to pass freely through the fabrics and to pull threads from the fabrics upon withdrawal of the needle to form a loop from the thread, a second means adapted to cause the needle bar to reciprocate during rotation, whereby the said needle is caused to pass through the fabric and after a half-turn of the needle to pick up the threads and then to withdraw the needle from the fabric and after the next half-turn to impart a twist to said loop.

20. The invention described in claim 19 wherein a bed plate is provided for supporting the fabric and provided with an opening through which said needle passes, a rotary feed member for the fabric, and an operating connection between said means for reciprocating the needle bar and said rotary feed member to impart feeding motion thereto.

21. The invention described in claim 19 wherein a bed plate is provided for supporting the fabric and having an opening for passage of the needle therethrough, said reciprocatory and rotary needle bar having said needle detachably connected therewith, said second means for reciprocating said needle bar including a rotatable cam and means for imparting a reciprocatory motion to the needle bar through relative rotation of said cam and said means for imparting a reciprocatory motion, a rotary feed member for the fabric, a notched wheel flxedly connected with said rotary feed member, a pivoted lever operatively connected with said cam to be rocked through reciprocatory motion of the bar and the cam, and an operating connection between said lever and said notched wheel to impart step by step rotary motion to said feed member.

22. The invention described in claim 19 wherein a bed plate is provided for supporting the fabric and having an opening for passage of the needle therethrough, said reciprocatory and rotary needle bar having said needle detachably connected therewith, said second means for reciprocating said needle bar including a rotatable cam and means for imparting a reciprocatory motion to the needle bar through relative rotation of said cam and said last means, a rotary feed member for the fabric, a notched wheel xedly connected with said rotary feed member, a pivoted lever operatively connected with said cam to be rocked through reciprocatory motion of the needle bar and the cam, an operating connection between said lever and said notched wheel to impart step by step rotary motion to said feed member, a presser coacting with said bed plate, said presser being attached to a bar, non-circular in cross section and mounted in corresponding openings in a support therefor for guiding the presser bar in a reciprocatory path, a finger lift on said presser bar and spring means acting on said presser bar to yieldingly press the presser against the fabric on the bed plate.

IVAN M. A. GARCIA.

REFERENCES CITED The following referenlces are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date Re. 363 Turner Mar. 25, 1856 25,968 Hudson Nov. 1, 1859 1,538,744 Ray May 19, 1925 4 2,226,449 Stephens Dec. 24, 1940 

